Typical problem with my office computer motherboard

It might be odd but its fact that my office computer won’t boot with the set BIOS configuration.

As I switch on my office PC it will display a message as “Disk boot error. No boot disk found” I have set the BIOS configuration with the active hard disk boot but it won’t recognize the hard disk on the first start-up, if I press restart button it will detect the hard drive and boot normally. Office PC has Windows XP Service pack 3 installed with latest updates and drivers.

Anyone have any idea what might be the problem?

You can give your genuine solution / suggestions in my post comments section.

Meanwhile I am trying to figure out what acually the cause. If I found the solution, I will be posting the solution for this in comments  section.